HomeCompare fishZig-zag eel vs African bonytongue Zig-zag eel vs African bonytongue: can they live together? Verdict: Not recommendedThe African bonytongue is aggressive towards other fish.The Zig-zag eel is aggressive towards other fish.The African bonytongue grows about twice as long as the Zig-zag eel; watch for bullying or predation.Both are comfortable at 24–27°C (75–81°F).A pH of 6.7–7.5 suits both.Side by sideZig-zag eelAfrican bonytongueAdult size38 cm (15 in)100 cm (39 in)Minimum tank475 L (125 US gal)455 L (120 US gal)Temperature22–27°C (72–81°F)24–30°C (75–86°F)pH6.5–7.56.7–7.5Hardness–4–12 dGH (71–214 ppm)TemperamentAggressiveAggressiveCommunity tankGood–Care levelEasyDifficultDietOmnivoreCarnivoreSpecies profilesZig-zag eelMastacembelus armatusAfrican bonytongueHeterotis niloticus